Bicycle crank



FIG. 1 is a perspective view of a bicycle crank showing my new design;

FIG. 2 is a right side elevation view thereof, the left side being a mirror image of that shown;

FIG. 3 is a front elevation view thereof, and

FIG. 4 is a rear elevation view thereof.

The broken lines shown in FIG. 1 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a bicycle crank, as shown and described. 